Exhibit 32.1

                            CERTIFICATION PURSUANT TO
                 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002


         In connection with the Annual Report of Life Sciences Research, Inc.
("LSR") on Form 10-K for the period ended December 31, 2006, as filed with the
Securities and Exchange Commission on the date hereof (the "Report"), I, Andrew
H Baker, Chairman of the Board and Chief Executive Officer of LSR certify,
pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the
Sarbanes-Oxley Act of 2002, that:

1.   The Report fully complies with the  requirements  of Section 13(a) or 15(d)
     of the Securities Exchange Act of 1934; and

2.   The information  contained in the Report fairly  presents,  in all material
     respects, the financial condition and results of operations of LSR.




Date:    March 14, 2007                          /s/    Andrew H Baker
                                                        --------------------
                                                        Andrew H Baker
                                                        Chief Executive Officer